OpenSUSE Displays and Drivers
Linux: You can activate dual monitors in Linux by running the following command in terminal as root:
For OpenSUSE Leap 42.3: "nvidia-settings"
(FYI: You can also use "nvidia-settings" on the other versions of OpenSUSE as well)
Click on the "X Server Display Configuration" and Enable the Second monitor if not already enabled.
For further help, please send an e-mail to firstname.lastname@example.org.